{"id":21847,"date":"2022-12-26T12:11:38","date_gmt":"2022-12-26T06:41:38","guid":{"rendered":"https:\/\/java2blog.com\/?p=21847"},"modified":"2022-12-26T12:11:53","modified_gmt":"2022-12-26T06:41:53","slug":"repeat-list-n-times-python","status":"publish","type":"post","link":"https:\/\/java2blog.com\/repeat-list-n-times-python\/","title":{"rendered":"Repeat List N Times in Python"},"content":{"rendered":"<div id=\"toc_container\" class=\"toc_light_blue no_bullets\"><p class=\"toc_title\">Table of Contents<\/p><ul class=\"toc_list\"><li><a href=\"#Using_the_operator\">Using the * operator<\/a><\/li><li><a href=\"#Using_the_numpyrepeat_function\">Using the numpy.repeat() function<\/a><\/li><li><a href=\"#Using_the_list_comprehension_technique\">Using the list comprehension technique<\/a><\/li><li><a href=\"#Using_the_itertoolsrepeat_function\">Using the itertools.repeat() function<\/a><\/li><li><a href=\"#Conclusion\">Conclusion<\/a><\/li><\/ul><\/div>\n<p>This tutorial will demonstrate how to repeat list n times in Python.<\/p>\n<h2><span id=\"Using_the_operator\">Using the <code>*<\/code> operator<\/span><\/h2>\n<p><strong>To repeat list n times in Python, use the <code>*<\/code> operator. Star operator(<code>*<\/code>) is used to multiply list by number e.g. <code>lst*3<\/code> and this will repeat list 3 times.<\/strong><\/p>\n<p>See the code below.<\/p>\n<pre code = \"Python\" title = \"Using the * operator\">\nlst = [2, 4, 6, 11]\nlst_new = lst * 3\nprint(lst_new)\n<\/pre>\n<p>Output:<\/p>\n<div class=\"content-box-green\">\n[2, 4, 6, 11, 2, 4, 6, 11, 2, 4, 6, 11]\n<\/div>\n<p>In the above example, we demonstrate the use of the <code>*<\/code> operator to repeat list n times in Python. This will repeat the elements of the list the required number of times.<\/p>\n<h2><span id=\"Using_the_numpyrepeat_function\">Using the <code>numpy.repeat()<\/code> function<\/span><\/h2>\n<p><strong>To repeat list n times in Python:<\/strong><\/p>\n<ul>\n<li><strong>Use the <code>numpy.repeat()<\/code> function to repeat every element n times in Python.<\/strong><\/li>\n<\/ul>\n<p>See the code below.<\/p>\n<pre code= \"python\" title = \"Using the numpy.repeat() function\">\nimport numpy as np\nlst = [2, 4, 6, 11]\nlst_new = list(np.repeat(lst,3))\nprint(lst_new)    \n<\/pre>\n<p>Output:<\/p>\n<div class=\"content-box-green\">\n[2, 2, 2, 4, 4, 4, 6, 6, 6, 11, 11, 11]\n<\/div>\n<p>The <code>numpy.repeat()<\/code> function repeats the elements of the array. It will repeat the elements individually the required number of times and return a <code>numpy<\/code> array. <\/p>\n<p>We can convert this array back to a list using the <code>list()<\/code> function.<\/p>\n<h2><span id=\"Using_the_list_comprehension_technique\">Using the list comprehension technique<\/span><\/h2>\n<p><strong>To repeat list n times in Python:<\/strong><\/p>\n<ul>\n<li><strong>Use the <code>for<\/code> loop to iterate over the list elements and create a new list using list comprehension.<\/strong><\/li>\n<li><strong>Use another <code>for<\/code> loop to iterate over every element and repeat it the required number of times.<\/strong><\/li>\n<\/ul>\n<p>See the code below.<\/p>\n<pre code = \"python\" title = \"Using list comprehension\">\nlst = [2, 4, 6, 11]\nlst_new = [a for a in lst for i in range(3)]\nprint(lst_new)    \n<\/pre>\n<p>Output:<\/p>\n<div class=\"content-box-green\">\n[2, 2, 2, 4, 4, 4, 6, 6, 6, 11, 11, 11]\n<\/div>\n<p>List comprehension is an elegant way to create lists using the <code>for<\/code> loop in a single line of code. <\/p>\n<p>To repeat list n times in Python, we use two loops in list comprehension. <\/p>\n<p>The first loop iterates over every element and the second loop will repeat it the required number of times.<\/p>\n<section class=\"read-more-posts\">\n<div class=\"rm-header\">\n<h2>Further reading:<\/h2>\n<\/div>\n<div class=\"rm-wrap\">\n<div class=\"rm-item\">\n<h5><a href=\"https:\/\/java2blog.com\/print-character-n-times-python\/\" target=\"_blank\" rel=\"noopener\">Print Character n times in Python<\/a><\/h5>\n<div class=\"ex\">\n            <a href=\"https:\/\/java2blog.com\/print-character-n-times-python\/\" target=\"_blank\" rel=\"noopener\">Read more \u2192<\/a>\n        <\/div>\n<\/div>\n<div class=\"rm-item\">\n<h5><a href=\"https:\/\/java2blog.com\/print-string-till-character-python\/\" target=\"_blank\" rel=\"noopener\">Print String till Character in Python<\/a><\/h5>\n<div class=\"ex\">\n            <a href=\"https:\/\/java2blog.com\/print-string-till-character-python\/\" target=\"_blank\" rel=\"noopener\">Read more \u2192<\/a>\n        <\/div>\n<\/p><\/div>\n<\/div>\n<\/section>\n<h2><span id=\"Using_the_itertoolsrepeat_function\">Using the <code>itertools.repeat()<\/code> function<\/span><\/h2>\n<p>To repeat list n times in Python:<\/p>\n<ul>\n<li>Use the <code>itertools.repeat()<\/code> function to repeat elements from an iterable.<\/li>\n<li>Use the <code>itertools.from_iterable()<\/code> function to return a flattened iterable from the input.<\/li>\n<\/ul>\n<p>See the code below.<\/p>\n<pre code = \"python\" title = \"Using the itertools.repeat() function\">\nimport itertools\nlst = [2, 4, 6, 11]\nlst_new = list(itertools.chain.from_iterable(itertools.repeat(i, 3) for i in lst))\nprint(lst_new)    \n<\/pre>\n<p>Output:<\/p>\n<div class=\"content-box-green\">\n[2, 2, 2, 4, 4, 4, 6, 6, 6, 11, 11, 11]\n<\/div>\n<p>The <code>itertools<\/code> library is used to work with complex iterables efficiently in Python. <\/p>\n<p>We can use the <code>itertools.repeat()<\/code> method to repeat the elements of a list and flatten it using the <code>from_iterable()<\/code> function. <\/p>\n<h2><span id=\"Conclusion\">Conclusion<\/span><\/h2>\n<p>To conclude, we discussed several methods to repeat list n times in Python. <\/p>\n<p>In the first method, we used the <code>*<\/code> operator to repeat a list the required number of times. In the following method, the <code>numpy.repeat()<\/code> function was used to repeat individual elements of the list.<\/p>\n<p>We demonstrated the use of the list comprehension technique to create a new list by using two successive <code>for<\/code> loops. The first loop will create a new list of the elements from the original list and the second loop will repeat these elements. <\/p>\n<p>In the final method, we discussed the use of the <code>itertools<\/code> library that can be used to deal with complex iterables in Python. We used the <code>itertools.repeat()<\/code> and <code>itertools.chain.from_iterable()<\/code> functions in this method.<\/p>\n<p>That&#8217;s all about how to repeat List N time in Python.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Table of ContentsUsing the * operatorUsing the numpy.repeat() functionUsing the list comprehension techniqueUsing the itertools.repeat() functionConclusion This tutorial will demonstrate how to repeat list n times in Python. Using the * operator To repeat list n times in Python, use the * operator. Star operator(*) is used to multiply list by number e.g. lst*3 and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"_mi_skip_tracking":false},"categories":[146,145],"tags":[],"_links":{"self":[{"href":"https:\/\/java2blog.com\/wp-json\/wp\/v2\/posts\/21847"}],"collection":[{"href":"https:\/\/java2blog.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/java2blog.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/java2blog.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/java2blog.com\/wp-json\/wp\/v2\/comments?post=21847"}],"version-history":[{"count":4,"href":"https:\/\/java2blog.com\/wp-json\/wp\/v2\/posts\/21847\/revisions"}],"predecessor-version":[{"id":22103,"href":"https:\/\/java2blog.com\/wp-json\/wp\/v2\/posts\/21847\/revisions\/22103"}],"wp:attachment":[{"href":"https:\/\/java2blog.com\/wp-json\/wp\/v2\/media?parent=21847"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/java2blog.com\/wp-json\/wp\/v2\/categories?post=21847"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/java2blog.com\/wp-json\/wp\/v2\/tags?post=21847"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}